You don't need more your already over max plunder. Need 15b spent on tut/s per 1mcs of your stats. Your hire value means nothing for what you need
Your own hire value (1.48T) doesn't affect your own max plunder. Try this: add your profile stats- Strength + Intelligence, then multiply the sum to 15000. 1,185,830 + 623,590 = 1,809,420 * 15000 = $27,141,300,000 ^ That should be the minimum value of your tutors combined for you to get max plunder.